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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 223 · 40 questions
TalentJR

The fast method (Keep a running total): Start with the first number. Add the tens of the next number, then its ones. Keep going until the list ends — only one total in your head at a time.

NameDateTime takenScore ___ / 40
  1. 1.67 + 38 + 13 + 89 =
  2. 2.24 + 30 + 68 + 17 =
  3. 3.25 + 28 + 51 + 57 =
  4. 4.88 + 73 + 87 + 60 =
  5. 5.62 + 37 + 42 + 26 =
  6. 6.19 + 70 + 19 + 88 =
  7. 7.16 + 51 + 28 + 62 =
  8. 8.42 + 40 + 71 + 62 =
  9. 9.83 + 89 + 30 + 58 =
  10. 10.86 + 40 + 67 + 51 =
  11. 11.24 + 29 + 80 + 61 =
  12. 12.22 + 50 + 13 + 86 =
  13. 13.38 + 89 + 67 + 69 =
  14. 14.30 + 75 + 84 + 66 =
  15. 15.32 + 35 + 34 + 26 =
  16. 16.48 + 48 + 44 + 29 =
  17. 17.38 + 28 + 11 + 66 =
  18. 18.47 + 53 + 48 + 60 =
  19. 19.25 + 60 + 36 + 56 =
  20. 20.12 + 43 + 38 + 17 =
  21. 21.17 + 34 + 82 + 47 =
  22. 22.20 + 38 + 65 + 86 =
  23. 23.53 + 78 + 64 + 61 =
  24. 24.89 + 18 + 71 + 25 =
  25. 25.69 + 23 + 13 + 87 =
  26. 26.32 + 20 + 11 + 79 =
  27. 27.21 + 21 + 28 + 42 =
  28. 28.57 + 72 + 68 + 77 =
  29. 29.19 + 61 + 49 + 29 =
  30. 30.40 + 33 + 53 + 53 =
  31. 31.39 + 61 + 74 + 55 =
  32. 32.57 + 19 + 67 + 29 =
  33. 33.20 + 73 + 52 + 15 =
  34. 34.15 + 28 + 51 + 14 =
  35. 35.76 + 73 + 88 + 14 =
  36. 36.82 + 54 + 47 + 72 =
  37. 37.49 + 48 + 31 + 68 =
  38. 38.14 + 46 + 83 + 40 =
  39. 39.32 + 66 + 29 + 30 =
  40. 40.85 + 14 + 89 + 68 =

Answer key

  1. 207
  2. 139
  3. 161
  4. 308
  5. 167
  6. 196
  7. 157
  8. 215
  9. 260
  10. 244
  11. 194
  12. 171
  13. 263
  14. 255
  15. 127
  16. 169
  17. 143
  18. 208
  19. 177
  20. 110
  21. 180
  22. 209
  23. 256
  24. 203
  25. 192
  26. 142
  27. 112
  28. 274
  29. 158
  30. 179
  31. 229
  32. 172
  33. 160
  34. 108
  35. 251
  36. 255
  37. 196
  38. 183
  39. 157
  40. 256

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